Baby won't settle down for bed

Maria

We have a structured routine, we do everything were supposed to. This kid flips a switch right at bed time and decides it's time to turn up. She will be sleepy, drowsy, not over tired and boom put her in her crib immediately it's play time. 11 months this week and I can't figure out what we're doing wrong. We can't really cio because our 3 year old shares the room. I'm just at a loss bedtime is taking over an hour and it's really stressing me out and exhausting me. 😫